05979557 is referenced by 299 patents and cites 18 patents.

A method is provided for limiting the inflow of formation water during a well turn around to maximize polymer recovery after a hydraulic fracturing treatment of a formation. The method includes a step for selectively blocking the pore structure in a water-bearing zone and not blocking the pore structure of a hydrocarbon zone at the formation face; performing a hydraulic fracturing treatment using a fluid having a polymer; and turning the well around to recover the polymer. There is also provided a method of acidizing, preferably matrix acidizing, a formation having a hydrocarbon zone and a water-bearing zone. The method includes a step for selectively blocking the pore structure in the water-bearing zone at the formation face to selectively retard migration of acid into the water-bearing zone; and injecting acid into the formation, wherein the acid is diverted from the water-bearing zone to the hydrocarbon zone as a result of the selective blocking step. When the water-bearing zone contains a residual amount of hydrocarbon residues, the method further includes injecting a mutual solvent prior to the step for selectively blocking.

In these methods, the step for selectively blocking preferably forms a plug of a viscous fluid in the pore structure of the water-bearing zone at the formation face. The viscous fluid preferably has at least a viscoelastic surfactant capable of forming a worm-like micelle in an aqueous environment, a water-soluble salt to effect formation stability, and an aqueous carrier fluid.

Title
Methods for limiting the inflow of formation water and for stimulating subterranean formations
Application Number
727877
Publication Number
5979557
Application Date
May 29, 1997
Publication Date
November 9, 1999
Inventor
Frank F Chang
Sugar Land
TX, US
Mathew M Samuel
Longview
TX, US
Dean M Willberg
Sugar Land
TX, US
Palathinkara S Vinod
Houston
TX, US
J Ernest Brown
Katy
TX, US
Roger J Card
Sugar Land
TX, US
Agent
Douglas Y Barbo
Assignee
Schlumberger Technology Corporation
TX, US
IPC
C09K 3/00
E21B 33/00
E21B 43/27
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